TI-99/4A CRU definitions

Definitions

For a introduction and usage of the CRU see Geneve CRU definitions

TMS 9901
Address in R12	Bit	Kind	Default	Function	Meaning
0000	0	-	0	control	mostly 0 (Interrupt mode)
0002	1	in	-	INT1	EXT. INT, Interrupt vector >0004
0004	2	in	-	INT2	VDP INT, Interrupt vector >0008
0006	3	in	-	INT3	Return value from keyboard (depends on set value of P2-P4) for the keys "=", ".", ",", "M", "N", "/", fire button Joystick 1 and 2
0008	4	in	-	INT4	Return value from keyboard (depends on set value of P2-P4) for the keys " ", "L", "K", "J", "H", ";", left for Joystick 1 and 2
000A	5	in	-	INT5	Return value from keyboard (depends on set value of P2-P4) for the keys ENTER, "O", "I", "U", "Y", "P", right for Joystick 1 and 2
000C	6	in	-	INT6	Return value from keyboard (depends on set value of P2-P4) for the keys "9", "8", "7", "6", "0", down for Joystick 1 and 2
000E	7	in	-	INT7	Return value from keyboard (depends on set value of P2-P4) for the keys FCTN, "2", "3", "4", "5", "1", up for Joystick 1 and 2 and ALPHA-LOCK
0010	8	int	-	INT8	Return value from keyboard (depends on set value of P2-P4) for the keys SHIFT, "S", "D", "F", "G", "A"
0012	9	in	-	INT9	Return value from keyboard (depends on set value of P2-P4) for the keys CTRL, "W", "E", "R", "T", "Q"
0014	10	in	-	INT10	Return value from keyboard (depends on set value of P2-P4) for the keys "X", "C", "V", "B", "Z"
0016	11	in	1	INT11	-
0018	12	in	1	INT12	-
001A	13	in	1	INT13	-
001C	14	in	1	INT14	-
001E	15	in	1	INT15	-
0020	16	-	-	P0	-
0022	17	-	-	P1	-
0024	18	out	-	P2	P2-P4 is the row number which selects the column of the keyboard matrix
0026	19	out	-	P3
0028	20	out	-	P4
002A	21	out	-	P5	set to one for asking ALPHA-LOCK status at INT7
002C	22	out	0	P6	Motor control for CS1
002E	23	out	0	P7	Motor control for CS2
0030	24	out	-	P8	Audio gate
0032	25	out	-	P9	Output for CS1 and 2
0034	26	in	-	P10	Input for CS1 and 2
0036	27	-	-	P11	-
0038	28	-	-	P12	-
003A	29	-	-	P13	-
003C	30	-	-	P14	-
003E	31	-	-	P15	-